Update README.md

README.md

@@ -30,7 +30,7 @@ Details for the next session:
 | Time  | Subject                                                                                | Teacher           | Contents                  |
 | ----- | -----------------                                                                      | ----------------- | ------------------------- |
 | 09:00 | [Introduction](https://git.lumc.nl/courses/gitcourse/wikis/files-most-recent/introduction.pdf)             | Mihai Lefter      | Welcome, version control introduction |
-| 09:30 | [Git basics](https://git.lumc.nl/courses/gitcourse/wikis/files-most-recent/20170906_-_git-course_-_git-basics.pdf) | Wibowo Arindrarto | Basic Git command line flow |
+| 09:30 | [Git basics](https://git.lumc.nl/courses/gitcourse/wikis/files-most-recent/basics.pdf) | Wibowo Arindrarto | Basic Git command line flow |
 | 10:15 | [Practical](https://git.lumc.nl/courses/gitcourse/wikis/files-most-recent/basics_handouts.pdf)             |                   |                           |
 | 11:00 | [The git commit graph](https://git.lumc.nl/courses/gitcourse/wikis/files-most-recent/commit_graph.pdf)  | Mihai Lefter   | Commit graph, branching, merging, and resolving merge conflicts. |
 | 11:45 | [Practical](https://git.lumc.nl/courses/gitcourse/wikis/files-most-recent/commit_graph_handouts.pdf)             |                   |                           |